641306523136 has 80 divisors (see below), whose sum is σ = 1294850383200. Its totient is φ = 317281484800.

The previous prime is 641306523083. The next prime is 641306523139. The reversal of 641306523136 is 631325603146.

It is a super-2 number, since 2×641306523136² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641306523139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118779765 + ... + 118785163.

It is an arithmetic number, because the mean of its divisors is an integer number (16185629790).

Almost surely, 2^641306523136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641306523136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647425191600).

641306523136 is an abundant number, since it is smaller than the sum of its proper divisors (653543860064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641306523136 is a wasteful number, since it uses less digits than its factorization.

641306523136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7815 (or 7799 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 641306523136 in words is "six hundred forty-one billion, three hundred six million, five hundred twenty-three thousand, one hundred thirty-six".